Oil burner



1. G. ROBINSON AND N. A. THON. OIL BURNER.

APPLICATION FILED JUNE 9, 1920.

1,413,615. l l Patented Apr. 25, 1922,

, 4 SHEETS-SHEET I.

1.16. ROBINSON AND- R. A. THOM.

OIL BURNER. APPLICATION FILED 'JUNE 9, 1920.

'4 SHEETS-SHEET 2.

Patented Apr. l25, 1922.

J. Gv. RBl-NSUN AND R. A. THON.

OIL BURNER.

APPLlATloN HLED JUNE 9,1920.

Patented 'Api'. 25, 1922.

4 SHEETS-SHEET 3.

J. G. ROBINSGNv AN-D R. A. vTHOM'.l

OIL BURNER.`

APPLICATION FILED IuIIE 9, 1920.

Patented Apr. 25, 1922.

JOHN GEORGE ROBINSON AND ROBERT ABSALOM THOINL-OF FAIRFIELD, MANCHESTER ENGLAND.

OIL BURNER.

Application vled .Tune 9,

such as a mixture of pulverized coal and oil.

The invention consists broadly of a burner o f the injector type wherein the kinetic energy of elastic fluid, preferably superheated steam, from any suitable source of supply is utilized for ensuring the-ejection of the fuel in atomized form andwhere the elastic fluid is heated-such as; would be the case if steam is usedits heat is employed for reducing the viscosity of the mixture.l In some cases, however, a supply of compressed air may be used and where necessary this air -may be heated prior to vuse in the burner so that its heat may beutilized for maintaining the fuel in a sufficiently iuidl condition. n

The invention broadly consists in the provision of an injector for colloidal fuel and wherein the kinetic energy of a hot inducing Huid is ,employed for effecting the injection and also for reducing the viscosity'of the fuel.

` The burner according to our invention isA of the injector type and in addition to the central jet of fuel inducing fluid is provided with means whereby the fuel will be subjected to the action of a secondary supply of 'such iuid atl a point lbetween the central jet and the burner or ignition nozzle. This secondary supply ofthe inducing fluid is preferably introduced into the vfuel at a velocity greater than that of the fuel4 where it is acted upon by the inducing fluid.

A vfurther feature of the invention consists in providing means whereby the fuel will be heated in the burner as it is being fed to the central jet of inducing fluid.

In the preferred form of the burner the central jet of inducing fluid' is deliveredy into a tapering fuel delivery nozzle forming the end of an annular chamber into which the fuel is fed, and in which a length of the jet pipe extendsso as to act as a heater lto the surrounding fuel before it is acted upon by the inducing uid. The fuel'l delivery4 leading to an annular fuel chamber b.

Specification of Letters lllatent. Patntd Apr. 25, 1922..

1920. r Serial. No. 387,669. ,l

nozzle. extendsinto and forms the central member of an annular chamber receiving the burner or ignition nozzle of flat velongated section. The fuel supply and the inlets of lthe prinuar and secondary supplies of induclng flui being provided with controlling valves so arranged that one, a number, or all of the desired.

The burner may be provided with means for adjusting the ,angle of delivery in the combustion chamber of the furnace. In another form of the invention the burner is provided with an axis about which the jet or jets can be rocked, and also with means for rocking it about such axis in such a manner as to give it an intermittent angular motion.

In the various forms'of the burnerv illusjets can bebrought into use asL trated by the accompanying drawings, Fig.

l isa sectional elevation, Fig. 2' a sectional plan and Fig. 3 an endelevation of a single fjet burner. Figs. 4, 5 and 6 are corresponding views of a three jet burner, and Figs. 7 and 8 are side and front elevations .of the fuel and steam supply system to a three jet burner. Figs. 9, 10, 1l and 12 are corresponding views of a three jet burner provided with means for adjustingit/s angular position, Fig. 11 being a section through the fuel passages on the laxis of adjustment.

lnthese drawings@ is the fuel inlet inclined to the axis of the burner as shown anl steamer inducing iuid pipe c extends axially into this chamber, its end being constructed to form a jet nozzle e.` The nozzle e is made conical onpits outside and extends into a conical outlet forming an end of the annular fuel chamber Z2. This outlet is arrangedto form a nozzle extending into an annular chamber g provided with a steam inlet g4.

'zle at a greater velocity than the jet issuing from the -nozzle j".

The steam inlets c4 and g'l are connected to the steam supply systems by any suitable unions, such as g5 and ge.

The burner Vis divided into two4 main sections A and B. The section B consists of a hollow cylindrical casting forming the fuel feeding chamb an inlet a, having a flange 0:1 forconnecting tothe fuel supply system. Into the rear end cf the section B 1s screwed the steam inlet pipe o having at its outer end the jet nozzle e. The fuel nozzle l separate piece screwed into the section B and" also into'the rear end of the section A co-axial withthechamber g of the secondary steaml s upply.1 The burner nozzle R is formed on the section A on whichl enceto Figs.

-The fuel inlet a leads to the central annu co-axial with the jets \and the is also formed the steam inlet g1.

A-form of the multiple jet burner is illus 'trated in Figs. 4, 5,6 and`7. In this example three jets are shown, it ma however, be constructed with any suitab e number of jets. rl`he pipes c1, 02 and c3 of three central steam jets e1, e2 and es are screwed into the rear of the fuel chambers b1, b2 and bs, formed in the casting B. The section B is connected to the nozzle` section A by means of lian es B1 and A1 and bolts or sere/ws. Eacho the fuel jets impels fuel into a 'common burner or ignition nozzle la. The vfuel nozzles f1, f2 and f3 -are screwed into .the rear of the section A' at points secondary steam supplying chambers g1, g2 and g3. The arrangement and action of each jet and nozzle is the same as described with refr- 1, 2 and.

' 'lar fuel chambery, while the fuel nua a2 communicates by means of branch passages a3 and a4 with the annular fuel chamf bers b1 and b3 respectively. `v -j These fuel passages are controlled by means of valves Z and mi arranged in a casting C secured Aby-meansl of bolted flanges at one end tothe mainv fuel supply D and 'to the other to the section B of the burner, and provided with hand lever operating mechanism Z1 and m1. lt will be readily l understood that by means of the lever ll'the supply of fuel to the central jet can be regulated'or cut off, and that by I means of thev lever m1 i the two outer thesupply of fuelto jets f1 and fa can be controlled simultaneously, so that by this 'arrangement', the central jet ofthe two outer ones -nected by e2 and P1 er and which is provided with f is formed as a the outer' end of" tight Lrockable vtrunnion,

front chamber l miams or all three can be brought in use las de?, sired. 7 -I l The primary and secondary supplies of steam ar'e controlled by means of valves P, P1 and Q, Q1 respectively, yP being conl(piping g8 to primary steam jet elng connected by piping g9 to the primary steam jets e1 and e3, the secondary steam supply from the valve Q, beingrconnected by piping g7 to the secondary 75 steam jet chamber g2, and from the valve Q1 by pipingfg10 to the secondary steam jet chambers g1 and g3, so that the steam supply to the jets can be controlled in a manner corresponding to the control of the `fuel supply by the lever Z1 and m1,. v

n order to provide means. for adjusting the angular position of the burningin the combustion chambers, it maybe constructed as shown in -Figs. 9, 10,11 and 12. The general details of the fuel and steam nozzles beingthe same as in the precedin example. The fuel passages on the section yare however in trunnions forming the axis 'about whichthe inclination o f the burner can be adjusted.

' The fuel passage a of the ycentral fuel chamberbZleads through the centre of a trunnion flange B2, while the fuel passages as' and a4 of the ch'ambers b1 and b3 join 95 together and lead through the centre of a trunnion flange B3.

rlhe flanges' B2 and B3- are bolted to corresponding langes on the fuel supply ipes in such a manner that by loosening the olts the angular position of the burner can be adjusted and held in such position by tightening up the bolts.

ln the form of the burner wherein it. is provided 4with means -for giving it an intermittent angular motion the flanges B2 and B3 are replaced by any sui able fluid and any suitable mechanism provided for imparting the desired angular motion to the burner about these trunnions.

"i/Vhatowel claim and desire `to secure by LetterspPat/ent is 1. An injector burner comprisin a casmg, chambers n said casing arrange in airs, the chambers in a pair being dispose one' behind the other, a' steamAjet extending centrally through the rear chamber of each pair,- means for feedin fuel to said rear chamber, an outlet in t e front end of the front chamber' of each pair, a conical tube connectingthe rear chamber with said outlet so as to leave an annular space between said conical tube and outlet, and means for, supplying steam under pressure to said which steam is A caused t0. issue in the form of a jet from said annular space thereby forming, with the other steam jet, two steam jets of di'erent'velocibers, the rear jet discharging into the said conical tube, substantially as specied.

2. An injectorburner. comprisin a casing, chambers in said casing arrange in pairs, the chambers in a pair being disposed one behind the other, a steam jet extending centrally through the rear chamber of each pair, means for supplying said jet with steam, means for feeding fuel by gravity to the said rear chamber, an outlet in the front end of the front chamber of each pair, a conical tube connecting the rear chamber with said outlet so as to leave an annular space between said conical tube and outlet, means for supplying steam under pressure to said front chamber which steam is caused to issue in the form of a jet from said annular space thereby forming with the other steam jet, two Steam jets 'of different velocities in connection with each pair of chambers, the rear jet discharging into the said conical tube, and valve means for controlling the supply of fuel toeach said rear chamber and the steam to both said steam jets whereby 'each pair of jets may be used separately or together, substantially as specilie In testimony whereof We, ailix our signatures in presence of two Witnesses.

JOHN GEORGE ROBINSON. ROBERT ABSALOM THOM. Witnesses:

JAS. EDGE, MABEL N oirrri.k 

